/*
 * (c) Copyright 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 * [See end of file]
 */

package com.hp.hpl.jena.clusteredtdb.comms;

import java.util.ArrayList;


public class SocketPool {

	ArrayList<ReadWriteSocket> sockets;
	HostnameAndPort hap;
	int size;
	
	public SocketPool(int size, HostnameAndPort hap) {
		this.sockets = new ArrayList<ReadWriteSocket>(size);
		this.hap = hap;
		this.size = size;
		init();
	}

	private void init() {
		for(int i = 0; i < this.size; i++) {
			sockets.add(new ReadWriteSocket(this.hap, false));
		}
	}
	
	public ReadWriteSocket getFreeSocket() {
		synchronized(sockets) {
			while(sockets.isEmpty()) {
				try {
					sockets.wait();
				} catch (InterruptedException e) {
					System.err.println("ERROR: Thread interruption");
				}
			}
			//get last added socket: greater chance of reuse.
			ReadWriteSocket s = sockets.remove(sockets.size()-1);
			s.ensureActive();
			return s;
		}
	
	}
	
	public void freeSocket(ReadWriteSocket socket) {
		synchronized(sockets) {
			sockets.add(socket);
			sockets.notify();
		}
	}
	
	
	
}

/*
 * (c) Copyright 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
